Panoptikit

A lightweight, zero‑install analysis dashboard for inspecting network behavior from PCAP files. 

Comes with default rules for domains/apps to fingerprint, but you can edit them as well. Really simple narrow scope tool. About 60MB total. 

Exports PCAPs and statistics to JSON reports for further analysis.

No wireshark or heavy binary. Just define what domains you want to flag for in the ruleset, and start processing!